Loose Ball Bearing 12mm = 31/64" Inch Ceramic Balls (Si3N4) One Ball Loose Ceramic Balls 12mm Si3N4, this is a popular size that could be used in many Bicycle, Balls are made of Ceramic Si3N4.
Item: Loose Balls
Size: 12mm (31/64" Inch)
Material: Ceramic (Si3N4)
Quantity: One Balls VXB Category: Loose Ceramic Balls